New streaming demo

demos/modules/gdisp/gdisp_streaming/gfxconf.h

@@ -0,0 +1,42 @@
+/**
+ * This file has a different license to the rest of the GFX system.
+ * You can copy, modify and distribute this file as you see fit.
+ * You do not need to publish your source modifications to this file.
+ * The only thing you are not permitted to do is to relicense it
+ * under a different license.
+ */
+
+#ifndef _GFXCONF_H
+#define _GFXCONF_H
+
+/* The operating system to use - one of these must be defined */
+//#define GFX_USE_OS_CHIBIOS		TRUE
+//#define GFX_USE_OS_WIN32		FALSE
+//#define GFX_USE_OS_POSIX		FALSE
+
+/* GFX sub-systems to turn on */
+#define GFX_USE_GDISP			TRUE
+#define GFX_USE_GMISC			TRUE
+
+/* Features for the GDISP sub-system. */
+#define GDISP_NEED_VALIDATION	TRUE
+#define GDISP_NEED_CLIP			FALSE
+#define GDISP_NEED_TEXT			FALSE
+#define GDISP_NEED_CIRCLE		FALSE
+#define GDISP_NEED_ELLIPSE		FALSE
+#define GDISP_NEED_ARC			FALSE
+#define GDISP_NEED_SCROLL		FALSE
+#define GDISP_NEED_PIXELREAD	FALSE
+#define GDISP_NEED_CONTROL		TRUE
+#define GDISP_NEED_MULTITHREAD  FALSE
+#define GDISP_NEED_STREAMING	TRUE
+
+/* Builtin Fonts */
+#define GDISP_INCLUDE_FONT_UI2          FALSE
+
+#define GFX_USE_GMISC			TRUE
+#define GMISC_NEED_FIXEDTRIG	FALSE
+#define GMISC_NEED_FASTTRIG		FALSE
+#define GMISC_NEED_INVSQRT		TRUE
+
+#endif /* _GFXCONF_H */

demos/modules/gdisp/gdisp_streaming/main.c

@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
+ * Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
+ * Derived from the 2011 IOCCC submission by peter.eastman@gmail.com
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *    * Neither the name of the <organization> nor the
+ *      names of its contributors may be used to endorse or promote products
+ *      derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "gfx.h"
+#include <math.h>
+
+#define Lightgrey ()
+#define Midgrey ()
+#define Darkgrey (HTML2COLOR(0x303030))
+
+#define BALLCOLOR1	Red
+#define BALLCOLOR2	Yellow
+#define WALLCOLOR	HTML2COLOR(0x303030)
+#define BACKCOLOR	HTML2COLOR(0xC0C0C0)
+#define FLOORCOLOR	HTML2COLOR(0x606060)
+#define SHADOW		(255-255*0.2)
+
+int main(void) {
+	coord_t		width, height, x, y, i, l, m, n, floor;
+	color_t		colour;
+	float		ii, spin, o, spinspeed, h, f, g;
+
+	gfxInit();
+	gdispSetOrientation(GDISP_ROTATE_90);
+
+	width = gdispGetWidth();
+	height = gdispGetHeight();
+
+	i=height/5+height%2+1;
+	ii = 1.0/i;
+	floor=height/5-1;
+	spin=0.0;
+	l=width/2;
+	m=height/4;
+	n=.01*width;
+	o=0.0;
+	spinspeed=0.1;
+
+	while(1) {
+		// Draw one frame
+		gdispStreamStart(0, 0, width, height);
+		for (y=0; h = (m-y)*ii, y<height; y++) {
+			for (x=0; x < width; x++) {
+				g=(l-x)*ii;
+				f=-.3*g+.954*h;
+				if (g*g < 1-h*h) {
+					/* The inside of the ball */
+					if ((((int)(9-spin+(.954*g+.3*h)*invsqrt(1-f*f))+(int)(2+f*2))&1))
+						colour = BALLCOLOR1;
+					else
+						colour = BALLCOLOR2;
+				} else {
+					// The background (walls and floor)
+					if (y > height-floor) {
+						if (x < height-y || height-y > width-x)
+							colour = WALLCOLOR;
+						else
+							colour = FLOORCOLOR;
+					} else if (x<floor || x>width-floor)
+						colour = WALLCOLOR;
+					else
+						colour = BACKCOLOR;
+
+					// The ball shadow is darker
+					if (g*(g+.4)+h*(h+.1) < 1)
+						colour = gdispBlendColor(colour, Black, SHADOW);
+				}
+				gdispStreamColor(colour);	/* pixel to the LCD */
+			}
+		}
+		gdispStreamStop();
+
+		// Motion
+		spin += spinspeed;
+		m += o;
+		o = m > height-1.75*floor ? -.04*height : o+.002*height;
+		n = (l+=n)<i || l>width-i ? spinspeed=-spinspeed,-n : n;
+	}
+}